<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>超链接按钮</title>
    <style>
        a:link{
            display: block;
            width: 93px;
            height: 29px;
            background-image: url("./img/btn.png");
        }

        a:hover{
            background-position: -93px;
        }

        a:active{
            background-position: -186px;
        }

    </style>
</head>
<body>
    <a href="javascript:;"></a>
</body>
</html>